Arthur wise cash



(No Model.)

A. W. CASH.

NIPPLE OHUOK.

No. 452,768! Patent ed May'26,1891.

WITNESSES; INVENTOR,

fi/ ZMW A TTORNEY.

UNITED STATES V PATENT CEEicE.

ARTHUR IVISE CASH, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE ARMSTRONGMANUFACTURING COMPANY, OF SAME PLACE.

CHUCK.

SPEGIFICATION'forming part of Letters Patent No. 452,768, dated May 26,1891.

Application filed February 6, 1891.

To aZZ whom it may concern.-

Be it known that I, ARTHUR WIsE GAsI-I, a citizen of theUnited States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inNipple-Chucks; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to certain novel and useful improvements innipple-chucks, such as are used by steam and gas fitters for makingunions or nipples either from blanks especially made for that purpose orfrom short lengths of pipe.

It is the object of my invention to provide a chuck which may be .usedin connection with any ordinary vise, and in which the plunger by theuse of a single wedge may be operated in either direction, whereby asingle chuck may be arranged to hold nipples of two different sizes; andwith these ends in view my invention consists in the construction andcombinations of elements hereinafter fully explained, and then recitedin the claims.

In order that those skilled in the art to which my invention appertainsmay fully understand its construction and its methods of operation, Iwill describe the same in detail, reference being had to theaccompanying drawings andthe numerals and letters marked thereon, whichform a part of this specification.

Figure 1 is a central longitudinal section showing my device inoperative connection with a nipple of a size suited to its larger eX-tremity; Fig. 2, a similar view showing its method of operation as toits smaller end; Fig. 3, a vertical section upon the line y y of Fig. 1;Figs. 4 and 5, modifications.

The body of my improved chuck consists of an iron sleeve or tube 1,which is shouldered near one end, as seen at 2. At one end it isprovided with internal screw-threads 3 and at the other end withscrew-threads 4, the diameters of the two screw-threaded portionspreferably differing for the purpose of making the single chuck answerfor two sizes Serial No. 380,412. (No model.)

of work without the use of bushings or similar appliances. Thechuck-body 1 has a rectangular slot 5 cut through it from top to bottom.The shape of this slot may be seen by comparison of Fig. 3 with eitherof the foregoing figures. Arranged Within the chuckbody is aloosely-fitting plunger 6, having one extremity shouldered and reduced,as seen at 7, so as to tit the reduced interior bore of the chuck body.This plunger is somewhat shorter than the chuck-body, substantially asshown. At its center the plunger is provided with a tapered mortise 8,and through this mortise and also through the slots in the chuck-bodypasses a wedge 9, which in longitudinal section is quite looselyadapted. to the openings through which it passes. At its smaller endthis wedge is provided with a stop, such as a transverse pin 1.0, toprevent its complete withdrawal out of engagement with the other parts.By means of this wedge the plunger may be driven in either direction forthe purpose of securing a nipple in either end of the chuck, as follows:Referring now to Fig. 1, the blank A, one end of which has beenthreaded, is screwed into the threaded extremity 3 of the chuck-bodynearly to the bottom of the threads. Then the wedge is driven in,thereby forcing the plunger longitudinally in the direction of the arrowuntil it abuts firmly against the inner end of the nipple and binds thelatter in the threads. \Vhen this end of the chuck is used, it will beobserved that one edge of the wedge abuts against the end walls of theslots 5, which are denoted by a, and the other edge of the wedge bearsagainst the wall of that mortise in the plunger which is lettered b. InFig. 2 this bearing of the wedge is reversed, one edge engaging with theend walls 0 of the slots and the other with the end wall d of theplunger-mortise, whereby a reverse movement to that of Fig. 1 isproduced and the plunger driven tightly against the end of the nipple B.

When held in the chuck as above described,

the blank end of the nipple may be suitably threaded by any ordinary orconvenient tool, the chuck meanwhile being secured firmly, as

in a vise. When the threading operation is TOO finished, the wedge isdriven out, whereby the thrust of the plunger against the nipple isreleased and the latter may be freely unscrewed.

If it be desired to hold the nipple with especial firmnessas, forinstance, to out thereon a thread of opposite incline to that in thechuck-the end of the plunger may be squared or serrated, as seen at 11,Figs. 4 and 5. The edges or corners of this portion will then be crowdedslightly into the metal of the nipple by the action of the Wedge,thereby affording an exceedingly tight grasp on the work.

I claim- 1. In a nipple-chuck, the combination, with the tubular bodyhaving threaded extremities, of the internally-seated movable plunger,and a wedge passing through said plunger and the chuck-body and adaptedto move the former in either direction, substantially as described.

2. The combination, with the tubularbody screw-threaded at itsextremities and vertically slotted, of the internally-seated movableplunger provided with a mortise, and a wedge passing through the slotsand mortise, said wedge being as to its central bearing portion narrowerthan either opening through which it passes.

In testimony whereof I aifix my signature in presence of two witnesses.

ARTHUR WVISE CASH.

Witnesses:

SHERMAN HARTW'ELL HUBBARD, M. O. HINCHOLIFFE.

